Core i7-990X Extreme Edition vs Core 2 Extreme QX9775

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Primary details

Comparing Core 2 Extreme QX9775 and Core i7-990X Extreme Edition processor market type (desktop or notebook), architecture, sales start time and price.

Place in the rankingnot ratednot rated
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorDesktop processor
Seriesno dataIntel Core i7EE
Architecture codenameYorkfield (2007−2009)Westmere (2010−2011)
Release dateMarch 2008 (16 years ago)13 February 2011 (13 years ago)

Detailed specifications

Core 2 Extreme QX9775 and Core i7-990X Extreme Edition basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores4 (Quad-Core)6 (Hexa-Core)
Threads412
Base clock speed3.2 GHzno data
Boost clock speed3.2 GHz3.46 GHz
Bus typeno dataQPI
Bus rate1600 MHz6.4 GT/s
Multiplierno data26
L1 cache64K (per core)no data
L2 cache12 MB (shared)1.5 MB
L3 cache0 KB12 MB
Chip lithography45 nm32 nm
Die size2x 107 mm2239 mm2
Maximum case temperature (TCase)63 °Cno data
Number of transistors820 millionno data
64 bit support++
Windows 11 compatibility--
Unlocked multiplier+-
VID voltage range0.85V-1.35Vno data

Compatibility

Information on Core 2 Extreme QX9775 and Core i7-990X Extreme Edition compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration11 (Uniprocessor)
SocketLGA771no data
Power consumption (TDP)150 Watt130 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Extreme QX9775 and Core i7-990X Extreme Edition. You'll probably need this information if you require some particular technology.

AES-NI-+
Enhanced SpeedStep (EIST)++
Turbo Boost Technology-no data
Hyper-Threading Technology-no data
Idle States+no data
Thermal Monitoring+-
Demand Based Switching-no data
FSB parity-no data

Security technologies

Core 2 Extreme QX9775 and Core i7-990X Extreme Edition technologies aimed at improving security, for example, by protecting against hacks.

TXT-no data
EDB+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Extreme QX9775 and Core i7-990X Extreme Edition are enumerated here.

VT-x+no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme QX9775 and Core i7-990X Extreme Edition. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR2no data
Maximum memory sizeno data24 GB

Pros & cons summary


Physical cores 4 6
Threads 4 12
Chip lithography 45 nm 32 nm
Power consumption (TDP) 150 Watt 130 Watt

i7-990X Extreme Edition has 50% more physical cores and 200% more threads, a 40.6% more advanced lithography process, and 15.4% lower power consumption.

We couldn't decide between Core 2 Extreme QX9775 and Core i7-990X Extreme Edition. We've got no test results to judge.


Should you still have questions on choice between Core 2 Extreme QX9775 and Core i7-990X Extreme Edition, ask them in Comments section, and we shall answer.

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Intel Core 2 Extreme QX9775
Core 2 Extreme QX9775
Intel Core i7-990X Extreme Edition
Core i7-990X Extreme Edition

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Community ratings

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